What's the must-see thing in Seoul?

Gyeongbokgung sits at the foot of Bugaksan, and that mountain backdrop is the thing photographs don't prepare you for. The Geunjeongjeon throne hall — stone-floored, open on all sides — catches cool air off the mountain even in late spring, so the temperature drops a few degrees the moment you step under the eaves. At 9am on a weekday, you might have the Gyeonghoeru pavilion almost to yourself: the two-story wooden structure floats on a rectangular lotus pond, and the reflection is so still it looks painted. By 11am the hanbok rental crowds arrive, and the courtyard turns into a photo backdrop. That's not a complaint — it's genuinely fun to watch — but the palace reads differently when it's quiet. The guard-changing ceremony at 10am and 2pm runs about twenty minutes, with drums you feel in your chest from thirty metres away. No reservation needed. Closed Tuesdays.

Walk north from Gyeongbokgung's east gate and within fifteen minutes you're in Bukchon Hanok Village, which sits on the ridge between Gyeongbokgung and Changdeokgung palaces. The narrow lanes climb steeply — your calves will notice. The hanok rooftops are dark clay tile, and the walls are that specific Korean ochre that photographs warm. Worth noting: this is a residential neighborhood. People live here. Signs in Korean and English ask visitors to keep voices down, and the locals mean it. The best views come from Bukchon 5-gil and 6-gil, where the rooflines stack downhill toward Namsan Tower in the distance. Early morning or late afternoon light makes the difference between a flat snapshot and something worth keeping. That said, if you only have one day in Seoul, Bukchon is a thirty-minute walk-through between palaces, not a destination that needs its own half-day.

Gwangjang Market is the food answer to the palace question. Two subway stops from Gyeongbokgung on Line 1, the covered market has been running since 1905, and the food hall on the ground floor is where you eat your first real meal in Seoul. Bindaetteok — mung bean pancakes fried in pools of oil on cast-iron griddles — cost 3,000 to 5,000 won each, about two to three dollars. The oil splatters and the smoke hangs thick enough to taste. Mayak gimbap, those tiny rice rolls with sesame oil and hot mustard dipping sauce, run about 3,000 won for a plate. Yukhoe — raw beef tartare with egg yolk and shredded Asian pear — is the market's signature dish, and it tends to be better here than at most sit-down places in Gangnam because the turnover is relentless. The stall owners will gesture you to a seat. Point at what the person next to you is eating. Nobody minds.

The sequencing matters. Gyeongbokgung at 9am, walk to Bukchon by 10:30, Gwangjang Market for a late lunch around noon. You'll be done by 2pm with the three most important things in Seoul behind you, and you still have the afternoon for Namsan Tower or the Cheonggyecheon stream walk — both low-effort, no tickets needed. If jet lag hits hard, flip it: Gwangjang Market opens at 8:30am and warm bindaetteok helps more than coffee does at that hour. The palace still works at 2pm; you just lose the empty-courtyard window. Seoul's subway runs signs in four languages, and a T-money card from any convenience store — 2,500 won deposit, load as you go — covers all three of these. Don't bother with taxis for this route. Everything sits within walking distance once you're in Jongno-gu.